Playground spool alarm

# playground_spool
Alarm system for your 3D printer spool, to let you know of finished or failed prints, based on Adafruit's Circuit Playgroud

- Github repo: https://github.com/fede2cr/playground_spool
- Thingiverse: https://www.thingiverse.com/thing:1920690

## Description
The project is composed of two parts:
- A 3D printed adapter to attatch a Circuit Playground plus a battery, to a 3D printer fillament spool.
- Software for the Playground to monitor the rotation of the spool by usi